Hollow auger.



No. 690,338; Patented Dec. 3|; i901. A. A. wuon.

HOLLOW AUGER.

(Application filed Sept. 17. 1900.)

2 Sheets-Sheet I.

- (No Model.)

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No. 690,338. Paten ted Dec. 3|, 19m A. A. woon.

HOLLOW AUGER.

I (Application filed Sept. 17, 1900.) (No Model.) 2 Sheets-Shaat 2.

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IUNITED STATES PATENT FFICE.

ALBERT A. WOOD, OF ATLANTA, GEORGIA.

HOLLOW AUGER.

SPECIFICATION forming part of Letters Patent No. 690,338, dated December 31, 1901.

A Application filed fieptember 17, 1900. Serial No. 30,310. (No model.)

.To all whom, it may concern.

Be it known that I, ALBERTA. WooD,a citizen of the United States of America,and a resident of Atlanta, in the county of Fulton and State of Georgia, have made a certain new and useful Improvement in Hollow Augers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such aslwill enable others skilled in the art to which it appcrtains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This device relates to tools for cutting tenons on the ends of wagon-spokes and the like by reducing their diameter,the invention consisting, primarily, in certain novel forms of mechanism for adjusting the cutting size, adjusting the knife whereby said cutting is accomplished, and in certain minor improvements in form and construction of the parts.

The device is shown in the accompanying drawings, in which- Figure l is a side elevation of the auger. Fig. 2 is a face view thereof, and Fig. 3 aside elevation thereof in line with the edge of the cutting-knife. Fig. 4: is a View of the head, showing the adjusting-screw and slid- 3b ing V-block, being in section on the line w m,

Fig. 2. Fig. 5 is section of Fig. 2 on the line at as. Fig. 6 is a plan of the V-block, and Fig. 7 is an inverted plan view thereof, Fig. 8 being a view of the rear end. Fig. 9 is a side view of the adj usting-screw.

In the figures like reference characters are uniformly employed in the designation of corresponding elements of construction in all the views.

A is the head; 13, the shank piece; 0, the stop, and D the spindles. of the three last-named parts-that is, the shank-pieces B, stop 0, and spindles Dis immaterial to this device, as any form of construction for such parts will suffice for this present description. The forms shown, however, follow the same parts as set forth in my application for Letters Patent for like device filed November 6, 1899, Serial No. 735,926, of 5c the series of 1880.

The head A is in the form of a circular face- The construction plate, finished on its face and edge and having a hole in its center the size of the maximum capacity of the auger. A radial (or otherwise) guideway a is provided in said face, and below said guideway, as best shown in Figs. 4 and 5, is a subrecess, preferably semicircular in form, the end wall of which recess is perforated and screw-threaded in said perforation to receive the lead-screw ct,

which is provided near its head with an annular flange or subhead a which fits against the bottom of the said subrecess and projects a portion into the aforesaid guideway. The V-block a the concave face of which forms part of the wall of the central aperture and also forms two bearing-points for the tenon being cut, lies in the said guideway, fitting same and having movement radially of the central aperture therein. The under side of the said V-block is provided with a notch or recess to fit the annular subhead a which runs therein, and as said screw is screwed into and out of the screw-threaded perforation in the end wall of the subrecess this ongagement of said annular subhead and the recess will cause a correlative movement of the V'-block. A spring a is seated in the V-block a so as to bear upon the peripheral surface of the said subhead a and by bearing forcibly thereon not only retard its otherwise free movement under the tremor of the \l-block in working, but by pressing said subhead against the surface of the semicircular recess still further increases the friction therebetween, whereby this screw 0, will under no circumstances work out. It is plain that to cut tenons truly cylindrical, reliable to size, and smooth this V-block must be stable in its adj'ustmentsthat is, it must remain where it is set and not be permitted to spring back or recede from reliable contact with the two points on the tenon. This would be insured by a tight fit of the lead-screw thread were it practicable to make and keep such a condition in a screw-thread in so short a space. This being practically impossible I provide rigidity of the screw by causing the annular flange or subhead to run and lie in contact with the bottom of the subrecess aforesaid, so that any lateral thrust of the screw is resisted by a solid abutment, and the lead-screw is completely housed in and protected from bending under strain in working and from accidentalalteration of adjustment. The preferred formof construction of the V-block is to mill it from rectangular steel, and this consists in merely milling the V-face and guidegrooves, a pair of correlative ribs being milled in the sides of the depressed guideway. The formation of the guides and block might, however, be performed in many ways equally efficient.

A triangular notch is cut into the faceplate aforesaid and below this on the head A is formed a concave housing or web a extending from the back side of the face-plate to an inclined arm a, the upper side of which arm forms the bearing and support for the knifeandshould be at such an angle to the face of the headA that the cutting edge of the knife will stand parallel to the face and at a proper distance above same. The cutting edge of the knife should also be parallel to the corner a Fig. 3; but this is merely a matter of grinding the knife to such angle that it will be so. The construction just described leaves an open space under the front half or third of the knife, so that chips have free exit and there is no danger of choking. The knife 0. is a strip of steel beveled on its upper side andends at such an angle that its,

edge has a little lead-that is, its cutting edge A than any other part of it.

a is the knife-cap,which is formed as shown in Figs, 1, 2, and 3, having a recess in its lower side for the knife, or, rather, to fit over the upper side of the knife and retain its proper relative position thereto, the ends of said, cap being extended beyond said knife and its inner end being provided for the reception of the screw a while its outer end.

shown, which permits the strap to pivot on,

the screw a Therefore the knife, by reason of the recess in the strap, swings with the said strap and is thereby adjusted toward or from the tenon. Other means than the groove in the strap might be employed to cause the knife and the strap to move together, but this form described is preferred; but it is foundby practice that the tendency of the knife and strap to swing on the pivotingscrew is greater than the tendency of the knife to slip back under the strap. I have therefore devised the following means to ad just with precision and hold the knife with absolute rigidity against this tendency to swing by the force of'and away from the work. From the lower side of the cap a near its outer front corner projects a lug 0. through which passes a set-screw n A flat abutting surface for the screw or is provided on the lug, as shown in Fig. 3. By means of this .be left in contact with its abutting surface,

thus preventing the displacement of the knife by the strap swinging on the pivoting-screw 10.

It will be seen that each of 'these two adjustments is independently made and secured.

Having thus described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is

l. Ina hollow auger, a head perforated and carrying a knife in cutting relation to said head, a substantially rectangular recess in the face of said head, a V-block slidably mounted in said recess and coincidentto said perforation, a subrecess below said V-block with its bottom parallel to same andaleadscrew provided with an annular flange and i screwed into the end wall of the saidsubrecess, said annular flange engaging said\/- iblock and contacting with the bottom of the subrecess by the periphery of said flange.

is projected higher above theface of the head a 2. In a hollow auger, aheadperforated and carrying a knife in cutting relation to said head, a substantially rectangular recess in the face of said head, a V block slidably mounted therein coincident withthe said perforation, an extension of said recess downwardly in said head below saidV-block with its bottom parallel to said V-block and a leadscrew screwed into the end wall of the lastnamed recess and adapted to engage said-V block, being for that purposeprovided with a subhead and said V-block being notched to receive the said subhead, substantially as specified.

3. In a hollow auger, a head, perforated and carrying a knife in cutting relation to said head, a substantially rectangular recess in the face of said head, a V-block slidably mounted in said recess, an extension of said recess downwardly below said V-block and having its bottom parallel thereto, a leadscrew screwed into the end metal of said recess and adapted to engage the said V-block by its head and the said V-block being notched to receive said head and a spring seated in said V-block and adapted to bear one of its ends upon said screw-head.

4. In a hollow auger a head perforated and carrying a knife in cutting relation thereto, a guideway in said head below the face thereof, a V-block slidabl y mounted in said guideway, a recess in the lower side of said V- block and a hole drilled in said V-block forming a continuation of said recess, a recess in the said head below the guideway, a lead- Ice screw screwed into the end metal of said lastbottom of the said recess in the head, for the named recess and being provided with a subpurpose specified. 10 head adapted to engage the said V-block by In testimony whereof I hereunto affix my the recess therein, and contact with the botsignature in presence of two witnesses.

tom of the recess in the head, and a spring ALBERT A. WOOD. seated in the aforesaid hole in the V-block Witnesses:

and adapted to bear upon the periphery of A. P. WOOD,

the said subhead and press same against the EDWD. P. W001). 

